JP5973764B2 - Container lid - Google Patents

Description

  The present invention includes a main body mounted on a container and an outer lid mounted on the main body, and a circular thin wall line defining a removal region is formed on a closing wall of the main body that closes the mouth of the container. It relates to a container lid in the form.

  As a container lid for liquid seasonings such as liquid beverages or soy sauce, edible oil, and dressings, the following Patent Document 1 discloses a container lid that includes a main body attached to a container and an outer lid attached to the main body. It is disclosed. The main body has a circular closed wall that closes the mouth of the container and a cylindrical mounting wall that extends upward from the outer peripheral edge of the closed wall, and a breakable circular thin line that defines the removal area is formed on the closed wall A male thread is formed on the outer peripheral surface of the mounting wall. The outer lid has a top wall and a cylindrical skirt wall depending from the top wall, and a female thread that cooperates with the male thread is formed on the inner peripheral surface of the skirt wall. Further, the main body and the outer lid cooperate to prevent the outer lid from rotating beyond a predetermined angular position in the opening rotation direction for releasing the screwing of the male screw and the female screw with respect to the main body. The rotation prevention means that cooperates with the main body and the rise prevention means that prevents the outer lid from moving upward beyond a predetermined position relative to the main body. More specifically, a cylindrical extending wall extending upward from the removal region is disposed on the upper surface of the closing wall of the main body, and a cylindrical hanging wall depending downward is disposed on the inner surface of the top wall of the outer lid. Has been. The inner diameter of the extending wall is somewhat larger than the outer surface of the hanging wall, and the hanging wall is positioned within the extending wall. The rotation preventing means includes a ratchet claw formed on the inner peripheral surface of the extending wall and a ratchet claw formed on the outer peripheral surface of the hanging wall, and the rising preventing means is formed on the inner peripheral surface of the extending wall. And the annular ridge formed on the inner peripheral surface of the hanging wall. When the main body with the outer lid attached as required is attached to the container as required, the ratchet claw formed on the outer lid is formed on the main body when the outer lid is rotated somewhat in the opening rotation direction. The outer lid is prevented from further rotating in the opening rotation direction with respect to the main body in contact with the ratchet pawl, but if the outer lid is further forced to rotate in the opening rotation direction, the ratchet constituting the rotation preventing means is A force is applied to the circular thin wall line formed on the closed wall of the main body, whereby the circular thin wall line is broken and the removal region is removed from the closed wall to generate a discharge opening. Then, when the outer lid continues to rotate in the opening rotation direction and is detached from the main body, the removal region is also detached from the main body along with the outer lid by the action of the ascent prevention means, and thus the contents of the container through the discharge opening. It becomes possible to discharge things.

JP 2008-308218 A

  Thus, the conventional container lid as described above has a circular thin wall because the entire circular thin line is broken at the same time immediately after the rotation of the outer lid with respect to the main body in the opening rotation direction is prevented. There is a problem to be solved that an excessive force is required to break the line.

  The present invention has been made in view of the above-mentioned facts, and a main technical problem thereof is a new and improved container lid capable of easily and easily breaking a circular thin-wall line without requiring excessive force. Is to provide.

  As a result of intensive studies, the inventor has attached a cut piece to the outer lid, and the circular thin-walled line by the action of the cut piece during the rotation of the outer lid until the rotation of the outer lid is prevented by the rotation prevention means. The above-mentioned main technical problem is achieved by partially cutting the outer cover and forcing the outer cover to rotate after the outer cover is prevented from rotating relative to the main body so that the remainder of the circular thin line is broken. I found that I can do it.

That is, according to the present invention, the container lid for achieving the main technical problem includes a main body attached to the container and an outer lid attached to the main body, and the main body closes the mouth of the container. A circular mounting wall and a cylindrical mounting wall extending upward from an outer peripheral edge of the blocking wall, and the blocking wall is formed with a breakable circular thin wall line defining a removal region; A male thread is formed on the outer peripheral surface, and the outer lid has a top wall and a skirt wall depending from the top wall, and a female cooperating with the male thread is formed on the inner peripheral surface of the skirt wall. Further, a thread is formed, and the main body and the outer lid have a predetermined rotational direction in which the outer lid releases the threaded engagement between the male thread and the female thread with respect to the main body. A rotation preventing means that cooperates to prevent rotation beyond the angular position, and the outer lid moves above a predetermined position relative to the main body. A container lid and increase preventing means for preventing cooperate from moving are arranged to,
The closed wall of the main body is provided with at least one arcuate recess in an annular region where the circular thin line is formed,
The outer cover has been attached is cut pieces is caused to enter the arc-shaped immersion portion, the sharp cutting edges are formed in the downstream end as viewed in the opening rotation direction of該切fragments,
A container lid is provided.

Preferably, the width of the circular thin line at a portion other than the arcuate immersive portion is larger than the width of the arcuate immersive portion. In this case, the arc-shaped immersion portion, the gap between them is in the open rotational direction upstream side end wall, expediently a pair of ribs that matches the width of the thin lines in the arc-shaped immersion portion is disposed It is. Two to six arc-shaped immersion parts are arranged at equal intervals in the circumferential direction, and correspondingly two to six cut pieces are also arranged at equal intervals in the circumferential direction. Is preferred. In a preferred embodiment, a cylindrical extension wall extending upward from the removal region is disposed on the upper surface of the blocking wall of the main body, and downward on the inner surface of the top wall of the outer lid. A hanging cylindrical wall is disposed, the inner diameter of the hanging wall is larger than the outer diameter of the extending wall, and the rising prevention means includes an annular ridge formed on the outer peripheral surface of the extending wall. It is comprised from the cyclic | annular protrusion formed in the internal peripheral surface of this drooping wall, and this cut piece protrudes below from the lower end edge of this drooping wall. In this case, the rotation preventing means has a plurality of abutting pieces disposed on the outer peripheral surface of the extending wall in the circumferential direction and a circumferential interval on the inner peripheral surface of the hanging wall. Conveniently it consists of a plurality of abutting pieces arranged. In another preferred embodiment, a cylindrical extending wall extending upward from the removal region is disposed on the upper surface of the closing wall of the main body, and an inner surface of the top wall of the outer lid is disposed on the upper surface of the top wall. A cylindrical drooping wall that hangs downward is disposed, and an additional wall that hangs down radially outward from the drooping wall is disposed, and the cutting piece is attached to the additional wall, The ascending prevention means includes an annular ridge formed on the inner peripheral surface or the outer peripheral surface of the extending wall and an annular ridge formed on the outer peripheral surface or the inner peripheral surface of the hanging wall. In this case, the rotation preventing means is provided on the outer peripheral surface or inner peripheral surface of the hanging wall and the plurality of abutting pieces disposed on the inner peripheral surface or outer peripheral surface of the extending wall at intervals in the circumferential direction. Conveniently, it is composed of a plurality of contact pieces arranged at intervals in the circumferential direction.

  In the container lid of the present invention, the circular thin-wall line is a first-stage cutting by the cutting piece until the rotation of the outer lid in the opening rotation direction with respect to the main body is prevented and the rotation of the outer lid in the opening rotation direction with respect to the main body. Since it is cut or broken by the second stage breakage caused by the forced rotation of the outer lid after the blocking of the outer lid, it can be cut or broken sufficiently easily without requiring excessive force.

The slope view of the main body in the suitable embodiment of the container lid comprised according to this invention. Sectional drawing of the main body shown in FIG. Sectional drawing of the outer lid in the preferred embodiment of the container lid comprised according to this invention. FIG. 4 is a bottom view of the outer lid shown in FIG. 3. Sectional drawing which shows the state which combined the outer cover shown in FIG.3 and FIG.4 with the main body shown in FIG.1 and FIG.2. The partial slope figure for demonstrating the fracture | rupture style of the circular thin line of a main body.

  The invention will now be described in more detail with reference to the accompanying drawings showing a preferred embodiment of a container lid constructed in accordance with the present invention.

  A preferred embodiment of a container lid constructed in accordance with the present invention comprises a main body 2 shown in FIGS. 1 and 2 and an outer lid 4 shown in FIGS. 3 and 4.

  Referring to FIGS. 1 and 2, a body 2 that can be injected or compression molded from a suitable synthetic resin such as polyethylene or polypropylene includes a circular closure wall 6. A cylindrical mounting wall 8 extending upward is disposed on the outer peripheral edge of the blocking wall 6. A male thread 10 is formed on the outer peripheral surface of the mounting wall 8. On the upper surface of the blocking wall 6, a substantially cylindrical guide wall 12 is also disposed that is located slightly inside the mounting wall 8 in the radial direction. A lip having a substantially semicircular cross section is provided at the upper end of the guide wall 12. A substantially cylindrical sealing piece 14 that hangs downward is also disposed on the outer peripheral edge of the blocking wall 6. Further, an annular flange 16 extending radially outward from the boundary region between the mounting wall 8 and the seal piece 14, and a substantially cylindrical outer wall 18 are also disposed below the outer peripheral edge of the annular flange 16. An annular protrusion 20 is formed at the lower part of the inner peripheral surface of the outer wall 18, and a locking shoulder surface 21 facing downward is formed at the lower part of the outer peripheral surface.

  A circular thin line 22 is disposed on the blocking wall 6 to define a circular removal region 24. In the annular region of the blocking wall 6 where the circular thin line 22 is formed, it is important that at least one, preferably 2 to 6, arcuate intrusions 26 are formed in the blocking wall 6. As clearly understood by referring to FIG. 1, in the illustrated embodiment, three arc-shaped recessed portions 26 are formed at equal intervals in the circumferential direction. In a region other than the arcuate immersion part 26, a relatively wide groove 28 is formed on the lower surface of the blocking wall 6 to generate a thin line. In the arcuate immersion part 26, the lower surface of the bottom of the immersion part is relatively wide. A narrow groove 30 is formed to produce a thin line, and the circumferential end walls of the arcuate recess 26 are thin, thus providing a breakable circular thin line 22 that is generally circular in plan view. Is formed. A pair of ribs 32 (FIGS. 1 and 6) are formed at some intervals on the end wall located upstream of the arcuate recess 26 in the opening rotation direction (counterclockwise as viewed from above in FIG. 2). Has been. The distance between the pair of ribs 32 is substantially the same as the width of the groove 30 and is aligned with the groove 30 in the radial direction. The circumferential extension angle α of each arc-shaped immersion part 26 may be about 40 to 70 degrees.

A cylindrical extending wall 34 extending upward is disposed on the outer peripheral edge of the upper surface of the removal region 24. An annular ridge 36 is formed at the upper end portion of the outer peripheral surface of the extending wall 34 (as will be apparent from the following description, the annular ridge 36 constitutes a rise prevention means). Three contact pieces 38 (FIG. 1 ) are formed at equal intervals in the circumferential direction at the lower end portion of the outer peripheral surface of the extension wall 34 (as will be apparent from the following description, such contact pieces 38 are formed. Constitutes rotation prevention means). Each of the contact pieces 38 may be in the form of a ratchet claw having a contact surface that stands up toward the upstream side in the opening rotation direction.

  3 and 4, the outer lid 4 that can be injected or compression-molded from an appropriate synthetic resin such as polyethylene or polypropylene, like the main body 2, has a circular top wall 40 and the top wall. A skirt wall 42 having a substantially cylindrical shape as a whole is suspended from the outer peripheral edge of 40. In the illustrated embodiment, the skirt wall 42 is a cylindrical upper part 44 that hangs down from the outer peripheral edge of the top wall 40, and a substantially frustoconical intermediate part that extends downwardly in a radially outward direction following the upper part 44. A part 46 and a cylindrical lower part 48 that hangs down from the intermediate part 46 are provided. An annular shoulder surface 47 is formed on the inner peripheral surface of the intermediate portion 46 and extends downward in the horizontal direction. A concave / convex shape 50 is formed on the outer peripheral surface of the upper portion 44 to prevent slipping of a finger hung thereon. A female thread 52 is formed on the inner peripheral surface of the upper portion 44. A fracture line 54 extending in the circumferential direction is formed at an axially intermediate portion of the lower portion 48, and a tamper evidence skirt portion 56 is defined at the lower half portion of the lower portion 48. The fracture line 54 includes an arcuate score 58 that extends in the circumferential direction at intervals in the circumferential direction and a bridging portion 60 that exists between the arcuate scores 58. An annular locking piece 62 that extends upward inward in the radial direction is disposed at the lower part of the inner peripheral surface of the tamper evidence skirt 56.

  A substantially cylindrical sealing piece 64 is formed on the inner peripheral edge of the top wall 40. A cylindrical drooping wall 66 is further formed on the inner surface of the top wall 40 so as to hang downward on the radially inner side of the seal piece 64. The inner diameter of the hanging wall 66 is larger by a predetermined value than the outer diameter of the extending wall 34 of the main body 2 described above. In the illustrated embodiment, the thickness of the upper half 68 of the hanging wall 66 is relatively thick, the thickness of the lower half 70 is relatively thin, and the inner diameter of the lower half 70 is larger than the inner diameter of the upper half 68. large. An annular protrusion 72 is formed at the lower end of the inner peripheral surface of the upper half portion 68. The annular protrusion 72 constitutes a rise preventing means that cooperates with the annular protrusion 36 of the main body 2 described above. A plurality of contact pieces 74 in the circumferential direction are formed on the inner peripheral surface of the lower half portion 70 at intervals in the circumferential direction. Each of the contact pieces 74 may be in the form of a ratchet claw having an abutment surface that is formed on the downstream side in the opening rotation direction. A plurality of, in the illustrated case, three pieces 76 are attached to the lower end of the lower half 70 of the hanging wall 66. As clearly understood by referring to FIG. 6 in conjunction with FIG. 3 and FIG. 4, each of the cutting pieces 76 is in the form of an arcuate piece extending further downward from the lower half 70 and is downstream of the opening rotation direction. The downstream end has a sharp cutting edge. Conveniently, the thickness of the cut piece 76 is somewhat smaller than the width of the groove 28 described above in the body 2. The cutting edge of the cutting piece 76 is conveniently inclined upward at an inclination angle of about 30 to 60 degrees in the opening rotation direction. The circumferential length of the cut piece 76 is slightly shorter than the circumferential length of the arc-shaped immersing portion 26 of the main body 2 described above.

  As described above, the main body 2 and the outer lid 4 align each of the three cutting pieces 76 disposed on the outer lid 4 with each of the three arc-shaped intruding portions 26 disposed on the main body 2. At least, as shown in FIG. 5, the outer lid 4 is forcibly lowered with respect to the main body 2 until the annular shoulder surface 47 of the outer lid 4 comes into contact with the annular flange 16 of the main body 2. Thus, as shown in FIG. 5, the female thread 52 of the outer lid 4 elastically climbs over the male thread 10 of the main body 2 and is screwed into this. The locking piece 62 formed on the inner peripheral surface of the tamper evidence skirt 56 of the outer lid 4 is positioned below the locking shoulder surface 21 formed on the outer peripheral surface of the outer wall 18 of the main body 2. The seal piece 64 of the outer lid 4 enters the guide wall 12 of the main body 2 and is brought into close contact with the inner surface of the guide wall 12. The hanging wall 66 of the outer lid 4 enters the outside of the extending wall 34 of the main body 2, and the annular protrusion 72 formed on the hanging wall 66 elastically deforms the annular protrusion 36 formed on the extending wall 34. And is positioned below the annular protrusion 36. The contact piece 74 formed on the inner peripheral surface of the hanging wall 66 and the contact piece 38 formed on the outer peripheral surface of the extension wall 34 are at a required angle as viewed in the opening rotation direction. 2 are spaced apart by an angular interval corresponding to the circumferential interval between the plurality of arcuate intrusions 26 disposed in 2 (see FIG. 4). A cutting piece 76 extending downward from the hanging wall 66 is positioned in the arc-shaped immersion portion 26 of the main body 2. The cut piece 76 extends to the vicinity of a position higher than the rib 32 in the arcuate immersion portion 26.

  FIG. 5 also shows a container mouth 78 to which a container lid constructed in accordance with the present invention is applied. A locking ridge 80 bulging outward in the radial direction is formed at the upper portion of the outer peripheral surface of the mouth portion 78 that is generally cylindrical. The container lid combined in the state shown in FIG. 5 is attached to the mouth-and-neck part 78 by being fitted to the mouth part 78 and forcibly lowered to the position shown in FIG. At this time, the annular protrusion 20 formed on the inner peripheral surface of the outer wall 18 of the main body 2 elastically climbs over the locking protrusion 80 of the mouth portion 78 and is locked thereto.

When the contents of the container are consumed, the outer lid 4 is rotated in the opening rotation direction (counterclockwise as viewed from above in FIG. 5). In this way, the cutting piece 76 disposed on the outer lid 4 advances in the circumferential direction from the arc-shaped immersing portion 26 and advances, and in a region other than the arc-shaped immersing portion 26 beyond the downstream end wall of the arc-shaped immersing portion 26. The thin line 22 is cut gradually. When the outer cover 4 is rotated by a predetermined angle with respect to the main body 2, the contact surface of the contact piece 74 of the outer cover 4 is brought into contact with the contact surface of the contact piece 38 of the main body 2. Resistance is generated in the rotation in the opening rotation direction. At this time, as shown in FIG. 6, the cutting edge of the cutting piece 76 extends from the region other than the arcuate immersive part 26 to the upper end wall of the arcuate immersive part 26 (from the pair of ribs 32). Are also cut off. When the outer lid 4 is further forced in the opening rotation direction, stress is generated on the bottom wall and the circumferential side end walls of the arc-shaped recessed portion 26 via the contact piece 74 of the outer lid 4 and the contact piece 38 of the main body 2. As a result, the portion of the thin line 22 that is not cut by the cutting piece 76, that is, the bottom wall and the circumferential side end walls of the arc-shaped immersion portion 26 is broken. Breaking occurs between the pair of ribs 32 in the end wall located on the upstream side in the opening rotation direction of the arc-shaped immersion part 26, and the thin line portion cut by the cutting piece 76 and the outer lid 4 are forcibly rotated. Thus, the thin line portion that has been broken is reliably connected. Breaking two-step pork slice lines 22, i.e. broken by forced rotation of the cutting and the outer lid 4 subsequent cleavage by piece 76, in due to be performed, as compared with the case of breaking the entire thin line at the same time, thin The torque required for breaking the line 22 can be sufficiently reduced.

  As described above, when the thin line 22 is broken throughout, the removal region 24 is separated from the blocking wall 6. Therefore, when the outer lid 4 is further rotated in the opening rotation direction, the removed removal region 24 is also rotated in the opening rotation direction together with the outer lid 4. When the outer lid 4 is rotated in the opening rotation direction, the threaded engagement between the female thread 52 of the outer lid 4 and the male thread 10 of the main body 2 is gradually released, so that the outer lid 4 is gradually raised with the rotation. Then, the main body 2 is made to cooperate with the annular protrusion 72 formed on the hanging wall 66 of the outer lid 4 and the annular protrusion 36 formed with the extending wall 34 disposed in the removal region 24. On the other hand, the outer lid 4 is prevented from being raised relatively, in other words, the removal region 24 is prevented from being displaced downward with respect to the outer lid 4, so that the removal region 24 is also raised together with the outer lid 4. It is done. On the other hand, in the tamper evidence skirt 56 of the outer lid 4, an annular locking piece 62 formed on the inner peripheral surface is locked to a locking shoulder surface 21 formed on the outer wall 18 of the main body 2. Therefore, the rise is prevented. Therefore, as the outer lid 4 rises, stress is generated in the breaking line 54, more specifically, in the bridging portion 60 to break the bridging portion 60, and the tamper evidence skirt 56 is in other parts of the outer lid 4. Detached from. Thereafter, the outer lid 4 is left with the tamper evidence skirt 56 and is lifted together with the removal region 24 detached from the main body 2 together with the rotation to be detached from the main body 2. An opening generated by cutting out the removal region 24 exists in the closing wall 6 of the main body 2 attached to the mouth portion 78 of the container, and the contents can be discharged through the opening. The guide wall 12 appropriately guides the discharge of the contents. After the required amount of contents has been discharged, the outer lid 4 is fitted on the main body 2 and the outer lid 4 is rotated in the closed rotation direction (clockwise as viewed from above in FIG. 5). The female thread 52 of the outer lid 4 is screwed to 10 so as to be in the state shown in FIG. 5, and thus the mouth 78 can be sealed again. When the outer lid 4 is attached to the main body 2, the removal region 24 can be detached from the outer lid 4 as necessary prior to this.

  The preferred embodiments of the container lid constructed according to the present invention have been described in detail with reference to the accompanying drawings. However, the present invention is not limited to such embodiments and does not depart from the scope of the present invention. It is not necessary to say variously that various modifications or corrections are possible. For example, in the illustrated embodiment, the hanging piece 66 is attached to the hanging wall 66 in the outer lid 4 together with the annular protrusion 72 and the abutting piece 74, but if desired, the outer wall 4 may be radially outward from the hanging wall 66. An additional wall hanging from the top wall 40 may be provided, and a cut piece may be attached to the additional wall. In this case, the hanging wall of the outer lid is configured to enter the inside of the extension wall of the main body, an annular protrusion and a contact piece are formed on the outer peripheral surface of the hanging wall, and an annular shape is formed on the inner peripheral surface of the extension wall. A protrusion and a contact piece can also be formed. Moreover, the contact piece in the main body can be formed directly on the upper surface of the blocking wall instead of the extending wall.

2: Main body 4: Outer lid 6: Blocking wall 8: Mounting wall 10: Male thread 22: Thin wall line 24: Removal area 26: Arc-shaped immersion part 28: Groove 30: Groove 32: Rib 34: Extension wall 36: Ring Projection (rising prevention means)
38: Contact piece (rotation prevention means)
40: top wall 42: skirt wall 52: female thread 66: drooping wall 72: annular protrusion (rising prevention means)
74: Contact piece (rotation prevention means)
76: Cut piece 78: Mouth of container

Claims (8)

A main body mounted on the container and an outer lid mounted on the main body, the main body closing a circular closing wall closing the mouth of the container, and a cylindrical mounting wall extending upward from the outer peripheral edge of the closing wall The closed wall is formed with a breakable circular thin line defining a removal area, and an external thread is formed on the outer peripheral surface of the mounting wall. There is a skirt wall depending from the top wall, and an internal thread that cooperates with the external thread is formed on the inner peripheral surface of the skirt wall. Rotation preventing means for cooperating and preventing the outer lid from rotating beyond a predetermined angular position in the opening rotation direction for releasing the screw engagement between the male screw and the female screw with respect to the main body; A container provided with an ascent prevention means for cooperatively preventing the outer lid from moving upward beyond a predetermined position relative to the main body. In,
The closed wall of the main body is provided with at least one arcuate recess in an annular region where the circular thin line is formed,
The outer cover has been attached is cut pieces is caused to enter the arc-shaped immersion portion, the sharp cutting edges are formed in the downstream end as viewed in the opening rotation direction of該切fragments,
A container lid characterized by that.   The container lid according to claim 1, wherein a width of the circular thin wall line at a portion other than the arcuate immersive portion is larger than a width of the arcuate immersive portion. The arc-shaped immersion portion, the gap between them is in the open rotational direction upstream side end wall, a pair of ribs that matches the width of the thin lines in the arc-shaped immersion portion is disposed, according to claim 2, wherein Container lid.   Two to six arc-shaped immersion parts are arranged at equal intervals in the circumferential direction, and correspondingly two to six cut pieces are also arranged at equal intervals in the circumferential direction. The container lid according to any one of claims 1 to 3.   A cylindrical extending wall extending upward from the removal region is disposed on the upper surface of the closing wall of the main body, and a cylindrical hanging wall depending downwardly on the inner surface of the top wall of the outer lid The inside wall of the hanging wall is larger than the outside diameter of the extending wall, and the rising prevention means includes an annular ridge formed on the outer peripheral surface of the extending wall and an inner circumference of the hanging wall. The container lid according to any one of claims 1 to 4, further comprising an annular ridge formed on a surface, wherein the cut piece projects downward from a lower end edge of the hanging wall.   The rotation preventing means is disposed on the outer peripheral surface of the extending wall with a plurality of abutting pieces spaced apart in the circumferential direction and on the inner peripheral surface of the hanging wall with a circumferential spacing. The container lid according to claim 5, further comprising a plurality of contact pieces.   A cylindrical extending wall extending upward from the removal region is disposed on the upper surface of the closing wall of the main body, and a cylindrical hanging wall depending downwardly on the inner surface of the top wall of the outer lid And an additional wall that hangs down radially outwardly from the hanging wall, the cutting piece is attached to the additional wall, and the ascent prevention means is the extension It is comprised from the cyclic | annular protrusion formed in the inner peripheral surface or outer peripheral surface of a wall, and the cyclic | annular protrusion formed in the outer peripheral surface or inner peripheral surface of this drooping wall in any one of Claim 1 to 4 Container lid as described.   The rotation preventing means includes a plurality of contact pieces arranged circumferentially on the inner peripheral surface or outer peripheral surface of the extension wall and the outer peripheral surface or inner peripheral surface of the hanging wall in the circumferential direction. The container lid according to claim 7, comprising a plurality of abutting pieces arranged at intervals.

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